Name
Hour
Roller Blade Lab
Purpose: Determine the relationship between force, mass, and acceleration.
a=
PART 1: Mass and acceleration
Skater #1_
Distance
(m)
3
Force
(N)
20
Time
(sec)
4.2
Mass = 45.5
6
20
6.1
3
20
7.2
6
20
10.3
___Δx_____
½ ∙ Δt2
Acceleration
(m/sec2)
Weight =
Skater #2
Mass = 65.9
Weight =
When the force remains constant but the mass is increased, the acceleration will:
Increase / Decrease
PART 2: Force and acceleration
Skater #1
Mass = 45.5
Distance
(m)
3
Force
(N)
30
Time
(sec)
3.2
6
30
4.6
3
30
5.6
6
30
7.9
Acceleration
(m/sec2)
Weight =
Skater #2
Mass = 65.9
Weight =
When mass remains constant but the force is increased, the acceleration will:
Increase / Decrease
General Conclusions:
1. As mass increases, acceleration _____________________ (if force is constant).
2. As force increases, acceleration _____________________ (if mass is constant).
Analysis:
1. What happened to the speed of the skater as they proceeded down the track?
2. What happened to the acceleration of the skater as they proceeded down the track?
3. Applying a constant force (or as close as we could get) produced a CONSTANT
velocity or acceleration. (circle one) Look at your answers to #1, 2!
4. Assume the force is constant. If the mass increases, what happens to acceleration?
5. Assume the mass of the skater is constant. If the force increases, what happens to
the acceleration?
6. Mass and force are
related.
7. Force and acceleration are
8. Mass and acceleration are
related.
related.
Choose either:
Directly related
Inversely related
9. Let’s say a skater weighs 140 lbs. What would their weight be in Newtons?
10. Suppose a 3 N force is applied to the skater and no movement results. What 1 word can
be used to explain this?
11. You pulled a skater with a mass of 65 kg from rest a distance of 9.2 m in 5.0 sec.
a. What was the skater’s acceleration?
b. What was the skater’s final velocity? Solve for this using 2 different equations!
Equation 1:
Equation 2:
c. Calculate the force that was exerted on the skater?
d. What was the skater’s weight in Newtons?
e. What was the skater’s weight in pounds?